I need a PowerApps Canvas for Stock Management

I need a PowerApps canvas that will allow our IT company to effectively manage and report on stock levels. We will need a table for managing the stock types and levels. We hold stock for multiple different companies so the solution will need to be able to account for this.

I would like to scan laptops in to the system using the barcodes (we will have a tablet this is run on) and then technicians should be able to see the available stock in a dashboard and checkout what they need. When the equipment is checked out it will send an email to the equipment team (we can manage this connection, just for extra info).

Not all items will be able to scan in via barcode so we will need to be able to add equipment manually. I've attached an asset table of the fields we need to track for each item.